Mayor Sadiq Khan said Londoners should remain “calm and vigilant” following a knife attack on Aug. 3 in a popular tourist area that killed one and injured five.

Meanwhile, the website TheReligionofPeace.com has released an updated list of Islamist terror attacks carried out in the last 30 days.

Emergency service workers attend to a victim of the attack in London’s Russell Square. /Rehana Azam/SWNS

“During this time period, there were 141 Islamic attacks in 22 countries, in which 1,165 people were killed and 1,803 injured,” the site reported (view list here).

Khan said his “heart goes out to the victims of the incident in Russell Square and their loved ones” after the death of the woman, who has not been identified but is believed to have been from the United States and in her 60s. Two women and three men suffered “various injuries” in the incident in central London.

“A man was arrested at the scene. Police have spoken to him and are seeking to establish the full facts including motives for this attack,” Khan said.

“I urge all Londoners to remain calm and vigilant. Please report anything suspicious to the police. We all have a vital role to play as eyes and ears for our police and security services and in helping to ensure London is protected.”

Scotland Yard said the suspect is a 19-year-old man who is a Norwegian national of Somalian origin.

Police had earlier said terrorism was “one line of inquiry that we should explore,” but later said that “whilst the investigation is not yet complete, all of the work we have done so far increasingly points to this tragic incident as having been triggered by mental health issues. At this time, we believe this was a spontaneous attack and that the victims were selected at random.”